<?php
/**
 * Smarty Internal Plugin Compile Section
 *
 * Compiles the {section} {sectionelse} {/section} tags
 *
 * @package    Smarty
 * @subpackage Compiler
 * @author     Uwe Tews
 */

/**
 * Smarty Internal Plugin Compile Section Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Section extends Smarty_Internal_CompileBase {

	/**
	 * Attribute definition: Overwrites base class.
	 *
	 * @var array
	 * @see Smarty_Internal_CompileBase
	 */
	public $required_attributes = array('name', 'loop');
	/**
	 * Attribute definition: Overwrites base class.
	 *
	 * @var array
	 * @see Smarty_Internal_CompileBase
	 */
	public $shorttag_order = array('name', 'loop');
	/**
	 * Attribute definition: Overwrites base class.
	 *
	 * @var array
	 * @see Smarty_Internal_CompileBase
	 */
	public $optional_attributes = array('start', 'step', 'max', 'show');

	/**
	 * Compiles code for the {section} tag
	 *
	 * @param array  $args     array with attributes from parser
	 * @param object $compiler compiler object
	 *
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		// check and get attributes
		$_attr = $this->getAttributes($compiler, $args);

		$this->openTag($compiler, 'section', array('section', $compiler->nocache));
		// maybe nocache because of nocache variables
		$compiler->nocache = $compiler->nocache | $compiler->tag_nocache;

		$output = "<?php ";

		$section_name = $_attr['name'];

		$output .= "if (isset(\$_smarty_tpl->tpl_vars['smarty']->value['section'][$section_name])) unset(\$_smarty_tpl->tpl_vars['smarty']->value['section'][$section_name]);\n";
		$section_props = "\$_smarty_tpl->tpl_vars['smarty']->value['section'][$section_name]";

		foreach ($_attr as $attr_name => $attr_value)
		{
			switch ($attr_name)
			{
				case 'loop':
					$output .= "{$section_props}['loop'] = is_array(\$_loop=$attr_value) ? count(\$_loop) : max(0, (int)\$_loop); unset(\$_loop);\n";
					break;

				case 'show':
					if (is_bool($attr_value))
						$show_attr_value = $attr_value ? 'true' : 'false';
					else
						$show_attr_value = "(bool)$attr_value";
					$output .= "{$section_props}['show'] = $show_attr_value;\n";
					break;

				case 'name':
					$output .= "{$section_props}['$attr_name'] = $attr_value;\n";
					break;

				case 'max':
				case 'start':
					$output .= "{$section_props}['$attr_name'] = (int)$attr_value;\n";
					break;

				case 'step':
					$output .= "{$section_props}['$attr_name'] = ((int)$attr_value) == 0 ? 1 : (int)$attr_value;\n";
					break;
			}
		}

		if (!isset($_attr['show']))
			$output .= "{$section_props}['show'] = true;\n";

		if (!isset($_attr['loop']))
			$output .= "{$section_props}['loop'] = 1;\n";

		if (!isset($_attr['max']))
			$output .= "{$section_props}['max'] = {$section_props}['loop'];\n";
		else
			$output .= "if ({$section_props}['max'] < 0)\n" . "    {$section_props}['max'] = {$section_props}['loop'];\n";

		if (!isset($_attr['step']))
			$output .= "{$section_props}['step'] = 1;\n";

		if (!isset($_attr['start']))
			$output .= "{$section_props}['start'] = {$section_props}['step'] > 0 ? 0 : {$section_props}['loop']-1;\n";
		else
		{
			$output .= "if ({$section_props}['start'] < 0)\n" . "    {$section_props}['start'] = max({$section_props}['step'] > 0 ? 0 : -1, {$section_props}['loop'] + {$section_props}['start']);\n" . "else\n" . "    {$section_props}['start'] = min({$section_props}['start'], {$section_props}['step'] > 0 ? {$section_props}['loop'] : {$section_props}['loop']-1);\n";
		}

		$output .= "if ({$section_props}['show']) {\n";
		if (!isset($_attr['start']) && !isset($_attr['step']) && !isset($_attr['max']))
		{
			$output .= "    {$section_props}['total'] = {$section_props}['loop'];\n";
		}
		else
		{
			$output .= "    {$section_props}['total'] = min(ceil(({$section_props}['step'] > 0 ? {$section_props}['loop'] - {$section_props}['start'] : {$section_props}['start']+1)/abs({$section_props}['step'])), {$section_props}['max']);\n";
		}
		$output .= "    if ({$section_props}['total'] == 0)\n" . "        {$section_props}['show'] = false;\n" . "} else\n" . "    {$section_props}['total'] = 0;\n";

		$output .= "if ({$section_props}['show']):\n";
		$output .= "
            for ({$section_props}['index'] = {$section_props}['start'], {$section_props}['iteration'] = 1;
                 {$section_props}['iteration'] <= {$section_props}['total'];
                 {$section_props}['index'] += {$section_props}['step'], {$section_props}['iteration']++):\n";
		$output .= "{$section_props}['rownum'] = {$section_props}['iteration'];\n";
		$output .= "{$section_props}['index_prev'] = {$section_props}['index'] - {$section_props}['step'];\n";
		$output .= "{$section_props}['index_next'] = {$section_props}['index'] + {$section_props}['step'];\n";
		$output .= "{$section_props}['first']      = ({$section_props}['iteration'] == 1);\n";
		$output .= "{$section_props}['last']       = ({$section_props}['iteration'] == {$section_props}['total']);\n";

		$output .= "?>";

		return $output;
	}

}

/**
 * Smarty Internal Plugin Compile Sectionelse Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Sectionelse extends Smarty_Internal_CompileBase {

	/**
	 * Compiles code for the {sectionelse} tag
	 *
	 * @param array  $args     array with attributes from parser
	 * @param object $compiler compiler object
	 *
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		// check and get attributes
		$_attr = $this->getAttributes($compiler, $args);

		list($openTag, $nocache) = $this->closeTag($compiler, array('section'));
		$this->openTag($compiler, 'sectionelse', array('sectionelse', $nocache));

		return "<?php endfor; else: ?>";
	}

}

/**
 * Smarty Internal Plugin Compile Sectionclose Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Sectionclose extends Smarty_Internal_CompileBase {

	/**
	 * Compiles code for the {/section} tag
	 *
	 * @param array  $args     array with attributes from parser
	 * @param object $compiler compiler object
	 *
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		// check and get attributes
		$_attr = $this->getAttributes($compiler, $args);

		// must endblock be nocache?
		if ($compiler->nocache)
		{
			$compiler->tag_nocache = true;
		}

		list($openTag, $compiler->nocache) = $this->closeTag($compiler, array('section', 'sectionelse'));

		if ($openTag == 'sectionelse')
		{
			return "<?php endif; ?>";
		}
		else
		{
			return "<?php endfor; endif; ?>";
		}
	}

}

?>
